Combination of Gaelic caol = 'slender, slim' with a diminutive ending 
See also Kelian
|Female ♀||Male ♂|
|#: count of main first name only|
|&: count of both main and additional first names|
| Name counts are approximate as statistics normally is not published
for names given to less than 3 or 5 persons per country.
No recent statistics trend found in databases for Caolán.